Imagine that you’re a mechanic whose hands are covered in grease, and you’re trying to follow repair instructions. Every time you need to turn the page or advance the screen, you have to put down your tools and wipe your hands. That’s why scientists from the Fraunhofer Center for Organics, Materials and Electronic Devices Dresden (COMEDD) have developed glasses that allow the wearer to flip pages on a digital document using nothing but their eyes.